Study on probability of detection for fatigue cracks in sonic infrared imaging

被引：10
|
作者：
Zhu, Jun-zhen [1 ]
Zhang, Chao-sheng [1 ]
Feng, Fu-zhou [1 ]
Min, Qing-xu [1 ]
Xu, Chao [1 ]
机构：
[1] Acad Armored Forces Engn, Dept Mech Engn, Beijing, Peoples R China
来源：
INFRARED PHYSICS & TECHNOLOGY | 2016年 / 77卷
关键词：
Sonic IR imaging; Crack heating; POD; THERMOGRAPHY;
D O I：
10.1016/j.infrared.2016.06.012
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Detection reliability of sonic infrared imaging is one of the increasingly important aspects for out of lab applications. And for the detection reliability evaluation, probability of detection (POD) for different defects under given test conditions has been successfully used as an accepted quantitative measurement. In this study, we test a set of C45 ferritic steel plates with artificial fatigue cracks. Experimental results show that the crack heating response increases with the increasing crack length, and the relationship between the logarithmic form of heat response signal and the crack length appears to be linear. Based on the above statistic characteristics, the linear regression analysis and the Wald method are adopted to estimate the POD function and its confidence interval. The study aims to provide a quantitative evaluation method for detection reliability in sonic infrared imaging. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：296 / 301
页数：6
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